The SLF12555T-681MR43 is a shielded power inductor manufactured by TDK Corporation. It is designed for use in power supply circuits, DC-DC converters, and other applications requiring high current handling and low DC resistance.

Applications:

• DC-DC Converters: Used as an energy storage element in step-up (boost) and step-down (buck) converters.
• Power Supplies: Employed in power supplies for filtering and energy storage.
• Voltage Regulators: Used in voltage regulators to smooth output voltage and reduce ripple.
• Noise Filtering: Employed in noise filtering circuits to suppress unwanted frequencies.
• Automotive Electronics: Suitable for use in automotive applications requiring robust components.

Features:

• Inductance: 680 μH (681)
• Tolerance: ±20%
• Saturation Current: High saturation current rating, designed for high current applications.
• Shielded Construction: Shielded to minimize EMI (Electromagnetic Interference).
• Low DC Resistance: Low DCR for high efficiency.
• Operating Temperature: Wide operating temperature range, suitable for harsh environments.
• Surface Mount: Designed for surface mount assembly.

Benefits:

• High Efficiency: Low DC resistance minimizes power loss, resulting in high efficiency.
• Reduced EMI: Shielded construction reduces electromagnetic interference.
• High Current Handling: Capable of handling high currents without saturation.
• Reliable Performance: Designed for reliable operation in harsh environments.
• Compact Size: Offers a compact size for space-constrained applications.

Additional Details:

The SLF12555T-681MR43 has dimensions of approximately 12.5 x 12.5 x 5.5 mm. The saturation current and rated current will vary depending on the specific conditions. It is important to consult the datasheet for the specific ratings. The inductor is typically constructed with a ferrite core. The terminals are designed for reliable soldering to the PCB. The inductor is RoHS compliant. The shielded construction helps to prevent interference with other nearby components. The 'T' in the part number likely signifies tape and reel packaging for automated assembly.